About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
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Presentation Title |
Anomalously Low Modulus of the Interpenetrating-phase Composites Synthesized by Liquid Metal Dealloying |
Author(s) |
Ilya Vladimirovich Okulov, Jana Wilmers, Pierre-Antoine Geslin, Henry Ovri, Soo-Hyun Joo, Hidemi Kato |
On-Site Speaker (Planned) |
Ilya Vladimirovich Okulov |
Abstract Scope |
Liquid metal dealloying is a modern metallurgical method enabling the synthesis of several classes of structural and functional materials: porous metals, interpenetrating-phase metallic, and hybrid (metal-polymer) composites. All these materials classes feature low elastic modulus in the range of that found for human bone as well as moderate strength values favorable for biomedical applications. Among others, metallic composites such as Ti-Mg and Fe-Mg possess anomalously low values of Young's modulus which are beyond the rule of mixtures. This deviation of elastic modulus can be explained by several mechanisms, namely, (i) the weak interfaces between immiscible bicontinuous phases promoting phase boundary sliding upon mechanical loading, (ii) interfacial distributed nanoscale porosity, and (iii) “hidden” local plastic deformation upon quasi-elastic loading regime. The micromechanical modeling demonstrated that the origin of the anomalously low modulus can be related to a weakened interface between the constituents. |
Proceedings Inclusion? |
Undecided |
Keywords |
Composites, Modeling and Simulation, Mechanical Properties |